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shutter speed of
just 1/60 second, vastly extending options in low-light conditions.
Gyro sensors
detect unwanted vibrations, triggering the corresponding movement of a
correcting lens group perpendicular to the optical axis. This alters the
light path, returning the image to its correct position on the sensor or
film plane.
The EF 70-300mm
f4-5.6 IS USM provides 2-mode IS for shooting immobile subjects. Mode 1
stabilizes the image along both the horizontal and vertical axes. For
shooting while panning to follow a moving subject, Mode 2 turns off
correction in the panned direction and prevents the effect of dragging the
subject back through the frame. IS switches off automatically when the
camera is mounted on a tripod, thus preventing feedback loops between the
IS sensor and stabilizer motor vibrations.
Superb
autofocus
The micro USM motor found in the EF 70-300mm f4-5.6 IS USM employs
ultra-sonic frequency vibrations to drive auto focus with unrivalled speed
and near-silent operation. Good holding torque stops the lens with
precision and accuracy, the instant it arrives at the correct focus point
and without overshoot. A high-speed CPU and optimised AF algorithm result
in a significant increase of AF speed compared to that of its predecessor.
A zoom ring
locking mechanism is provided that locks the zoom at the wide-angle
setting. This ensures that the lens is carried or stored in its most
compact position, preventing possible damage caused by the lens extending
and hitting obstacles when being carried mounted on a camera with a strap.
Pleasing
defocused background
The EF 70-300mm f4-5.6 IS USM employs an electro-magnetic diaphragm (EMD)
with a circular aperture. This helps create an attractive, even defocused
background when isolating a subject at large apertures.
Image quality
By optimizing Super Spectra lens coatings and lens element shaping,
Canon's engineers have been effective in suppressing flare and
ghosting--more prone to occur with digital cameras due to reflection off
the image sensor. By increasing light absorption, coatings reduce
reflections off lens element surfaces to deliver crisp, undistorted images
with natural color balance.
Focal length
translates to 112-480mm equivalent in 35mm film format when fitted to
EOS 20D and EOS 350D
cameras.
The EOS
system
The EF 70-300mm f4-5.6 IS USM includes distance metering information,
providing compatibility with the E-TTL II flash system of late model
cameras such as the
EOS-1D Mark II N and
EOS 5D . When used in
conjunction with Canon's range of EX Speedlite flash units, the lens
passes distance information to the flash algorithm for markedly improved
flash exposure metering.
Accessories for
the EF 70-300mm f4-5.6 IS USM include the lens hood ET-65B and the lens
pouch LP1222. In keeping with Canon's Kyosei philosophy of living in
harmony with the environment, the lens features only lead-free glass.
Product Description
This lens delivers over 4x telephoto zoom for Canon autofocus SLR
Digital-camera and Film-camera models. AF is super-fast and silent with a
ring-type USM, and it focuses down to 4.6 feet without rotating the front
element. A new zoom lock button keeps the lens safe and secure when not in
use or used at the widest lens perspective. Circular aperture producing
attractive background defocus Micro USM and new AF algorithms for fast and
quiet autofocus Only environmentally friendly lead-free glass used in lens
construction F stop range 4.5-32 / 5.6-38 Closest Focusing Distance 1.4m /
4.6 ft. 4.2x zoom magnification Accepts 58mm size filters Dimensions
(Length x Diameter) 3.9 x 3.2 / 99.9 x 82.4mm Weight 25.4 oz. / 720g
________________________________________________________________
Product Reviews:
There are Better, but There are More Worse, April 28, 2006
Reviewer: Brian Koch "Aspiring Photographer"
This is a good zoo lens. It is not as heavy or noticeable as something
like the 100-400 L lens. Also, with the 3 stop IS and smaller size and
weight this makes a great backup lens to the 100-400 on trips or when I
just don't feel like carrying around a 3+ pound lens all day. So if you
don't want to have to deal with the cost or size of an L series lens this
is one of the next best options.
________________________________________________________________
Canon Lenses, March 16, 2006
Reviewer: Pic Dick "Photo Nut"
This Canon Lens upholds the tradition of fine products from the Canon line
of photographic accessories. It takes very clear, sharp, hand held
pictures with the Image Stabilizer capability activated. It negates the
necessity of carrying a tripod every time one wants to take long telephoto
shots. It should be a must for any serious photographer that wanders the
countryside, taking candid pictures, and wants to lighten the load of
equipment carried.
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